Been doing a lot of research on preserved biomolecules lately, and found this recent reference, which has so far not been cited by anyone, according to Google Scholar (if the pdf image appears to be blocked, it can still be accessed by clicking on the link).
As you may be aware, the existence of original organic material in fossils presumed tens to hundreds of millions of years old is a giant hot potato in the paleontological community. Here, it is suggested that original coloration pigment was found in Eocene feathers.
Of interest is that the student's supervisor was Johan Lindgren, who recently published evidence of biomolecular preservation in a 70 my-old mosasaur, including detectable C-14. Lindgren et al. attributed the C-14 to contamination, but wot I say is, if it's got original organic material, shouldn't it at least be rigorously tested for C-14 in a manner that could reasonably eliminate contamination?
Here's a plea to all biomolecule researchers--test for C-14! And if any demur, claiming that it is impossible to eliminate the possibility of contamination, what does that say about the reliability of C-14 dating in general?